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Thitaporn Sukhotu Osamu Kamijima Kazuyoshi Hosaka 《Genetic Resources and Crop Evolution》2006,53(1):53-63
Solanum stenotomum Juz. et Buk. (2n = 2x = 24) is considered to be the most primitive diploid cultivated species from which all the other Andean cultivated potatoes
were originated (Hawkes 1990). To disclose chloroplast DNA (ctDNA) variability and the maternal origin of S. stenotomum, 36 accessions of S. stenotomum and 86 accessions of putative wild ancestral species were determined for ctDNA types and analyzed by high-resolution markers
(seven ctDNA microsatellites and an H3 marker). High-resolution markers discriminated 57 different ctDNAs (haplotypes), which
were classified into the W-type ctDNA group and C-, S- and A-type ctDNA group, and within the latter group S- and A-type ctDNAs
were distinct from each other among many different haplotypes mostly having C-type ctDNA. This ctDNA relationship supported
our previous findings obtained for mostly Andean cultivated species (Sukhotu et al. 2004). Compared with other putative ancestral
wild species, S. stenotomum showed somewhat limited ctDNA diversity, having two major haplotypes 1 and 2 also found in different wild species in different
places. Therefore, the ctDNA in S. stenotomum was of at least dual origins either by successive domestication from different species or else by introgression after initial
S. stenotomum arose. 相似文献
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Yaowalak Na-ek Arunee Wongkaew Thitaporn Phumichai Nongluck Kongsiri Rungsarid Kaveeta Tanee reewongchai Chalermpol Phumichai 《Journal of Crop Science and Biotechnology》2011,14(2):105-110
Ten microsatellite markers were used to investigate genetic diversity and genetic structure among 32 accessions of Jatropha curcas. Low levels of average genetic diversity were observed (H
E
= 0.160). A dendrogram produced by the Unweighted Pair Group Method with Arithmetic Mean (UPGMA) based on Nei’s genetic distances
revealed 3 groups among 32 accessions. The genetic differentiation (F
ST
) among two groups was significant (P < 0.01). The model-based Bayesian clustering method indicated that a population structure (ΔK) was separated into two groups. The analysis of molecular variance (AMOVA) showed higher variability (63.753%) among groups
than within groups (36.247%). These findings could assist in defining the best method of genetic conservation and studies
in breeding programs for genetic improvement of J. curcas. 相似文献
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